Webb Vortex Brake Drum 16.5 x 8.62 Balanced Outboard. Designed, cast, and machined in the USA to all applicable industry standards and recommended practices including FMVSS, SAE, TMC, ASTM, etc.. Backed by a nationwide warranty and the best product support in the business. Machine-to-Balance within industry recommended practice per TMC RP608. Webb Wheel Products is your OE first-fit and aftermarket heavy-duty wheel-end component parts leader. Manufactured in IATF 16949 or ISO 9001 registered facilities.